Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
No Cool Air Comes Out: |
Volume of refrigerant |
- |
|
Air conditioner pressure sensor circuit |
|
|
|
Air conditioning compressor magnetic clutch circuit |
|
|
|
Compressor lock sensor circuit |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Air conditioner amplifier assembly |
|
|
|
Wire harness or connector |
- |
|
|
No Cool Air Comes Out: |
Blower resistor |
|
|
Blower motor with fan sub-assembly |
|
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
No Cool Air Comes Out: |
No. 2 air conditioning radiator damper servo sub-assembly (for air mix) |
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
No Cool Air Comes Out: |
Volume of refrigerant |
- |
|
Blower motor performance check |
- |
|
|
Air mix damper servo full travel check |
- |
|
|
Recirculation damper servo operation check |
- |
|
|
No Engine Idle-up when A/C Switch ON |
Air conditioner amplifier assembly |
|
|
SFI system (2TR-FE) |
|
|
|
SFI system (2GR-FKS) |
|
|
|
Wire harness or connector |
- |
|
|
No Warm Air Comes Out: |
Blower resistor |
|
|
Blower motor with fan sub-assembly |
|
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
No Warm Air Comes Out: |
No. 2 air conditioning radiator damper servo sub-assembly (for air mix) |
|
|
PTC heater circuit*1 |
|
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
No Warm Air Comes Out: |
Volume of engine coolant |
- |
|
Air conditioning control assembly |
|
|
|
Blower motor performance check |
- |
|
|
Air mix damper servo full travel check |
- |
|
|
Recirculation damper servo operation check |
- |
|
|
Heater radiator |
- |
|
|
Air Not Coming From Desired Outlets: |
Blower resistor |
|
|
Blower motor with fan sub-assembly |
|
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
Air Not Coming From Desired Outlets: |
No. 2 air conditioning radiator damper servo sub-assembly (for air mix) |
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
Windshield Fogging: |
Volume of refrigerant |
- |
|
Air conditioner pressure sensor circuit |
|
|
|
Air conditioning compressor magnetic clutch circuit |
|
|
|
Compressor lock sensor circuit |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Air conditioner amplifier assembly |
|
|
|
Wire harness or connector |
- |
|
|
Windshield Fogging: |
Blower resistor |
|
|
Blower motor with fan sub-assembly |
|
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
Windshield Fogging: |
No. 2 air conditioning radiator damper servo sub-assembly (for air mix) |
|
|
Air conditioning control assembly |
|
|
|
Wire harness or connector |
- |
|
|
Windshield Fogging: |
Volume of refrigerant |
- |
|
Blower motor performance check |
- |
|
|
Air mix damper servo full travel check |
- |
|
|
Recirculation damper servo operation check |
- |
|
|
Defrosting Insufficient: |
Blower motor with fan sub-assembly |
|
|
Mode doors: Check cooling, heating & door operation |
- |
|
|
Mode control servo motor: Hot air not coming, Go to no hot air comes out |
- |
|
|
Mode control servo motor: Cold air not coming, Go to no cold air comes out |
- |
|
|
Noise: |
Blower motor: Inspect blower motor for debris/cracks |
- |
|
Fresh air intake area: Inspect fresh air intake area for debris |
- |
|
|
Noise: |
Cooler compressor: Cooler compressor incorrectly fitted |
- |
|
Air conditioning compressor magnetic clutch circuit |
|
|
|
Refrigerant charge amount |
- |
|
|
Compressor mounting bracket: Compressor mounting bracket incorrectly fitted |
- |
|
|
A/C lines secure & not grounded |
- |
|
|
Odor (Cycle through blower speed, mode, temperature to define odor type when engine is running and A/C switch is ON. (Musty smell, coolant oil smell)) |
Wet carpet: Inspect water, engine coolant or oil leaks |
- |
|
A/C drain tube: Inspect water, engine coolant or oil leaks |
- |
|
|
Fresh air intake area: Inspect water, engine coolant or oil leaks |
- |
|
|
Heater hose: Inspect water, engine coolant or oil leaks |
- |
|
|
Evaporator: Inspect water, engine coolant or oil leaks |
- |
|
|
Evapo case: Inspect water, engine coolant or oil leaks |
- |
|
|
Air Not Coming from Desired Outlets (Cycle the mode lever and check airflow for outlets when engine is running, A/C switch is ON.) |
Blower motor with fan sub-assembly |
|
|
No. 1 air conditioning radiator damper servo sub-assembly (for mode switching) |
|
|
|
Mode doors: Check cooling, heating & door operation |
- |
|
|
Wire harness or connector |
- |
|
|
Air conditioning control assembly |
|
|
|
The temperature control dial is rotated to the MAX A/C position, but the MAX A/C mode is not activated. |
No. 2 air conditioning radiator damper servo sub-assembly (for air mix) |
|
|
Air conditioning control assembly |
|
|
|
Air conditioning amplifier assembly |
|
|
|
Wire harness or connector |
- |
|
|
Quick heater assembly does not operate*1 |
PTC heater circuit |
|
|
Air conditioning amplifier assembly |
|
|
|
ECM (for 2TR-FE) |
|
|
|
ECM (for 2GR-FKS) |
|
.gif)
- *1: w/ PTC Heater
System Diagram
SYSTEM DIAGRAM
...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Air conditioning system data and the Diagnostic Trouble Codes (DTCs) can
be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system
seem ...
Other materials:
ABS Warning Light Remains ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination
meter assembly via CAN communication.
If any of the following is detected, the ABS warning light remains on:
The skid control ECU (brake actuator assembly) connectors are disconnected
from the ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
The wireless door lock control system troubleshooting procedure is based
on the premise that the power door lock control system is operating normally.
Check the power door lock control system first before troubleshooting the
wireless door lock cont ...
Terminals Of Ecu
TERMINALS OF ECU
1. REAR TELEVISION CAMERA ASSEMBLY
(a) Disconnect the T22 television camera assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table
below.
Terminal No. (Symbol)
Wiring Color
Terminal Description
...
